Method and system for ultrasonic sealing of food product packaging

A method for ultrasonically sealing food product packaging, said method including:

• sealing food product packaging by passing said food product packaging between an operably positioned rotating anvil and an ultrasonically activated rotating horn,
• wherein said rotating anvil has a plurality of anvil sealing surfaces distributed radially around said rotating anvil, and
• wherein said rotating horn has a plurality of horn sealing surfaces distributed radially around said rotating horn,
• wherein said food product packaging is passed between one of said plurality of horn sealing surfaces and one of said plurality of anvil sealing surfaces,
• wherein said rotating anvil rotates around a first axis of rotation and said rotating horn rotates around a second axis of rotation different from said first axis of rotation
• wherein a plurality of said plurality of anvil sealing surfaces are positioned at a fixed distance from said first axis of rotation,
• wherein said ultrasonically activated rotary horn rotates completely around said access of rotation so that at a first time a first of said plurality of horn sealing surfaces is operably positioned with respect to said rotating anvil wheel and so that at a second time a second of said plurality of horn sealing surfaces is operably positioned with respect to said rotating anvil wheel,
• wherein an ultrasonic converter is positioned axially to said ultrasonically activated rotating horn,
• wherein said ultrasonic converter causes said ultrasonically activated rotary horn to vibrate transversely to the radial direction of said rotating horn.